The superhero Mr. All America has decided to paint his house. Naturally, he can only choose from the colors red, white, and blue. How many possible color permutations can there be for the 4 sides of his house? If he painted all 4 sides white, that would be one permutation; a 2nd would be all sides red; a third would be the front white, and the other 3 sides red; a fourth would be the back white, and the other 3 sides red, and so on.